FASTCHEM is also compared with another simulator, DYNAMIX, with respect to both hydrology and geochemistry. The procedures adopted and the results and conclusions reached are divided into two parts dealing more » respectively with the hydrology and the geochemistry. Four fly ash disposal sites were selected from various climatic regions in the United States and modeled using the FASTCHEM package, the purpose being to evaluate its effectiveness and to recommend how simulations may be best carried out by utility scientists and engineers.
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The simulator was developed under EPRI sponsorship for the utility industry in order to model the leaching and transport of hazardous constituents from fly-ash impoundments. « lessįASTCHEM is a mathematical simulator, which is capable of modeling reactive chemical transport in the subsurface environment. The comparison places an emphasis on the impact of redox reactions when such reactions are omitted. FASTCHEM does not include provision for redox reactions. The geochemical comparison involves three sample cases, in all of which various toxic materials participate in redox and precipitation reactions. The hydrologic comparison involves two problems of non-reactive single-solute transport. FASTCHEM is a mathematical simulator, which is capable of modeling reactive chemical transport in the subsurface environment.
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